manpage: clarify syntax for color options

Options which take colors accept two variants. The first is "r/g/b/a",
the second is "#AARRGGBB". Since they put alpha at different places,
it's probably better to document the second variant explicitly. (It's a
bit strange that they put alpha in different places, but on the other
hand, it's kind of natural. The second variant should probably be
considered deprecated.)
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wm4 2015-01-05 06:15:03 +01:00
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@ -2453,7 +2453,7 @@ OSD
Alternatively, the color can be specified as a RGB hex triplet in the form
``#RRGGBB``, where each 2-digit group expresses a color value in the
range 0 (``00``) to 255 (``FF``). For example, ``#FF0000`` is red.
This is similar to web colors.
This is similar to web colors. Alpha is given with ``#AARRGGBB``.
.. admonition:: Examples